precision forging SS400 steel forgings

precision forging SS400 steel forgings

SS400 is a way of marking Japanese steel materials, a judgment standard, equivalent to domestic Q235 steel (also known as A3 steel). Foreign standard structural steel is often classified according to tensile strength, such as SS400 (this is how Japan marks it), where 400 means that the minimum value of σb is 400MPa. Ultra-high strength steel refers to steel with σb≥1373 Mpa.

Chinese name ss400

Foreign name steel for general structure

Indicates Japanese steel material

Properties A marking method

Equivalent to Q235 steel

Classification Tensile strength

The minimum value of 400σb is 400MPa

3 and Q235

P: 0.050 or less

S: 0.050 or less

[Mechanical properties]

Yield strength N/mm²

245 or more (a＜16mm) 235 or more (16mm＜a＜40mm)

215 or more (a＞40mm)

a: Steel thickness

Tensile strength N/mm²

400～510

About tensile strength

Definition

During the tensile process, the material enters the strengthening stage after the yield stage. As the transverse cross-sectional size of the tensile test is significantly reduced, the maximum force (Fb) that the specimen withstands before breaking is divided by the stress (σ) obtained by the original cross-sectional area (So) of the specimen, which is called tensile strength or strength limit (σb), in N/mm2 (MPa). It indicates the maximum ability of metal materials to resist destruction under tensile force.

Calculation formula

σ=Fb/So

Where: Fb--the maximum force that the sample bears when it is pulled off, N (Newton); So--the original cross-sectional area of ​​the sample, mm2.

Tensile strength (Rm) refers to the maximum stress value that the material bears before it is pulled off.

Universal material testing machine

When the steel yields to a certain extent, its ability to resist deformation is increased again due to the rearrangement of the internal grains. At this time, although the deformation develops rapidly, it can only increase with the increase of stress until the stress reaches the maximum value. After that, the ability of the steel to resist deformation is significantly reduced, and a large plastic deformation occurs at the weakest point. Here, the cross-section of the specimen shrinks rapidly, and necking occurs until it breaks. The maximum stress value before the steel is tensilely broken is called the strength limit or tensile strength.

Company introduction:

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. was established in 1997. It is a professional manufacturer of rough forgings engaged in manufacturing and processing automotive parts, marine gearbox accessories, and engineering machinery accessories. The company can forge copper alloy, titanium alloy, aluminum alloy, carbon steel, stainless steel, high temperature alloy and other materials. The company covers an area of ​​more than 10,000 square meters, with a standard factory building of 5,000 square meters. It has a complete set of advanced production technology and equipment from mold design, development, parts manufacturing and processing. It has multiple die forging production lines mainly based on 4000T, 2500T, 1600T, 1000T, and multiple auxiliary production lines. The annual output is 15,000 tons. It is exported to more than 20 countries and regions including Germany, the United States, the United Kingdom, France, Russia, etc.